PodMail

Send songs by email directly from iPod app! Even if DeleTrack didn’t work for you, this will, I promise! :-)
Go to iPod app -> Other -> Mail songs; here you’ll see a list of all of your songs. Touch any of them to send it via e-mail. (see Screenshots below for help)
Note: though this tweak uses MFMusicLibrary, it uses it for reading only. Thus, you don’t have to do any hacking with your device, it will work out of the box!